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A finished 25.6V 125Ah LiFePO4 battery built for 24V trolling motors and 24V marine and RV systems — one native 8S pack instead of two 12V batteries in series, with per-cell Bluetooth monitoring and automatic low-temperature heating, so it still charges in the winter boat shed and through ice-fishing season.
Request a quotation for this battery: Start a BTH-24V125 inquiry · WhatsApp: +86 159 8945 0735
The Cold Problem This Battery Solves
LiFePO4 cells must not be charged below 0 °C — charging a frozen cell damages it permanently. In 24V, almost every battery on the market handles cold the blunt way: the BMS simply blocks charging until the weather warms up. The battery is protected and useless at the same time — and the 125Ah size class is exactly where that hurts, because it is the capacity 24V trolling motors are built around: the boat comes off the water at dusk, goes into an unheated shed, and the charger that should refill it for tomorrow is refused all night.
This battery takes the other route. Heating film is built into the pack, driven by the BMS. When a charger is connected and the cells are below the heating threshold, the BMS powers the heaters from the charger first, warms the cells into the safe charging window, and only then lets charging current flow — automatically, with the low-temperature charge cut-off still standing guard behind it. You see the whole sequence in the app: cell temperatures rising, heating on, then charging under way.
The second half of the design is visibility — and the end of the series-pair blind spot. Two 12V batteries in series carry two BMS units that can never balance against each other, so the pair drifts apart invisibly until one of them starts cutting out early. This pack is one 8S unit with one smart BMS (Jiabaida/JBD platform — the same board family we supply as standalone smart BMS boards): all eight individual cell voltages, pack voltage and current, state of charge, both temperature sensors, cycle count and protection events, readable on a phone at the battery — no shunt, no display panel, no guessing which cell is drifting.
Reference Standard Configuration — 25.6V 125Ah
| Item | Reference configuration | Basis |
|---|---|---|
| Nominal voltage / capacity | 25.6V / 125Ah — 3,200Wh; 8S prismatic LiFePO4 | Fixed by the model |
| Smart BMS | JBD-platform smart BMS, 100A continuous class | Board model confirmed per order |
| Bluetooth monitoring | App readout: per-cell voltage (8 cells), pack voltage/current, SOC, temperatures, cycles, protection log | Standard fit on this series |
| Heating | Integrated heating film; auto-starts on charge below the set threshold (typ. 0 °C), powered by the charger; heating and charging status visible in the app | Standard fit on this series; thresholds set per order / in app |
| Low-temperature protection | Charge cut-off below the safe cell temperature remains active independent of heating | Standard BMS protection |
| Standard protections | Over-charge, over-discharge, over-current, short-circuit, over/under-temperature, cell balancing | Standard BMS protection set |
| Case | Sealed ABS battery case (steel case as an option) | Dimensions confirmed per order against the case in your configuration |
| Terminals | Standard top terminals, P+ / P− | Terminal form confirmed per order |
Read the Basis column the way our buyers do: the Bluetooth and heating functions define this series and are standard on every model in it; dimensions, terminal forms and board current class are confirmed in the order specification, because case moulds and board options in this class genuinely vary by programme. Final specifications are those in your order confirmation — not this page.
The Series — Configuration Options
| Model | Nominal | Energy | BMS class | Inquiry code |
|---|---|---|---|---|
| 12.8V 50Ah with Bluetooth & Heating | 12.8V 50Ah | 640Wh | 50A (100A option) | BTH-12V50 |
| 12.8V 100Ah with Bluetooth & Heating | 12.8V 100Ah | 1,280Wh | 100A (150A option) | BTH-12V100 |
| 12.8V 200Ah with Bluetooth & Heating | 12.8V 200Ah | 2,560Wh | 200A class | BTH-12V200 |
| 12.8V 314Ah with Bluetooth & Heating | 12.8V 314Ah | 4,019Wh | 200A class | BTH-12V314 |
| 12.8V 460Ah with Bluetooth & Heating | 12.8V 460Ah | 5,888Wh | 200A class | BTH-12V460 |
| 25.6V 100Ah with Bluetooth & Heating | 25.6V 100Ah | 2,560Wh | 100A class | BTH-24V100 |
| 25.6V 125Ah with Bluetooth & Heating (this page) | 25.6V 125Ah | 3,200Wh | 100A class | BTH-24V125 |
| 38.4V 100Ah with Bluetooth & Heating | 38.4V 100Ah | 3,840Wh | 100A class | BTH-36V100 |
| 51.2V 100Ah with Bluetooth & Heating | 51.2V 100Ah | 5,120Wh | 100A class | BTH-48V100 |
Every model in the table is the same product idea at a different voltage or size: Grade A prismatic cells, the JBD-platform smart BMS with Bluetooth, integrated heating, and the full protection set. This model is the 24V line taken to the trolling-motor capacity class — a native 25.6V pack replaces the common workaround of two 12V batteries in series, whose two BMS units can never balance against each other and whose heating, if fitted at all, runs as two separate systems. One 8S pack has one BMS, one heater control, one app view of all eight cells. Case format (sealed ABS or steel), terminal form, and OEM appearance (case colour, your logo and labels, rating plate, manual, packaging) are configuration options on all nine models.
What the Bluetooth Link Actually Tells You
- Per-cell voltages, all eight — the earliest warning of imbalance; you see the drifting cell months before it becomes a capacity complaint
- Live charge and discharge current, pack voltage, SOC — what a shunt monitor would tell you, without fitting one
- Both temperature sensors and heating state — whether the pack is heating, at what temperature charging started, and what the coldest cell reads
- Cycle count and protection events — the battery’s own service history, which is what warranty conversations and fleet maintenance actually run on
- Protection parameters — thresholds readable in the app; adjustable items are set per your order specification
For installers and distributors, this is the support feature as much as a user feature: a customer reporting “the battery stopped charging” can read you the protection log and cell temperatures from their phone, and a cold morning with heating under way looks exactly like what it is — not like a fault.
How the Heating Cycle Runs
- Charger connects, cells are cold. The BMS reads the temperature sensors below the heating threshold and holds charging current off.
- Heating starts, powered by the charger. The heating film warms the cell block evenly; the app shows temperatures climbing. No energy is taken from the pack itself in the standard configuration.
- Charging begins inside the safe window. Once cells reach the set temperature, the BMS opens charging and the heaters cycle off; the low-temperature cut-off stays armed the whole time, so a heater fault never becomes a frozen charge.
Heating energy comes out of the charger’s output, not your stored capacity — plugged into shore power in a cold shed, the first minutes go to warming, and the charge follows. If your application needs the pack warmed with no charger present, tell us the duty cycle in the inquiry; that is a project configuration, quoted as such, not a silent assumption.
Where This Battery Earns Its Keep
- 24V trolling motors and fishing boats — the capacity class these motors are specified around, in one pack instead of a series pair; a full day on the water and a battery that accepts the evening charge even when the shed is below freezing; see our marine battery page
- Ice fishing and winter-stored boats — charging in unheated storage through the cold season, with cell temperatures and heating state readable from the phone before you drive out
- 24V RV and van auxiliary systems — 3,200Wh in a single unit for house loads, without series wiring; see our RV battery page
- 24V off-grid and vehicle systems — solar storage and auxiliary banks in unheated spaces; see our off-grid energy storage page
If 100Ah covers your duty, the 25.6V 100Ah Bluetooth & heating battery is this design one size down. If your system is 12V, the 12.8V 100Ah Bluetooth & heating battery is this design at the lower voltage. If you build packs yourself, the same Bluetooth-and-heating board platform is available as a standalone smart BMS board.
OEM / ODM: Your Brand, Your Specification
This series is supplied for distributors, outfitters and private-label programmes: case colour, logo and rating labels, manuals and packaging carry your brand; configuration covers BMS current class, case format and terminal form across the nine models. Our role is coordination — requirements are confirmed in a written specification, matched against manufacturing partners’ production, with the agreed checkpoints and export documents handled on our side. The specification in your order document is what binds the shipment. Start from our OEM & ODM coordination page or the OEM / ODM RFQ checklist.
What to Send Us for a Quotation
- Model — 25.6V 125Ah, or another model from the series table
- Your coldest charging condition — the lowest temperature at which the battery must accept charge; this confirms the heating configuration
- Largest continuous load (trolling motor thrust / inverter size) — so the BMS current class is sized to the real discharge profile
- Charger you will pair it with — heating runs from the charger, so its output matters
- Quantity and destination — samples for evaluation, or your expected regular volume, plus the destination port
Frequently Asked Questions
Why one 24V battery instead of two 12V batteries in series?
Balancing and heating. A native 8S pack has one BMS balancing all eight cells and one heating system working on the whole block; a series pair has two independent BMS units that cannot balance across the pair, and each half of the pair ages and drifts on its own. One pack also means one Bluetooth view of every cell in the system. Confirm your charger’s 24V lithium profile in the inquiry and we flag any mismatch before you order.
Is 125Ah enough for a full day of trolling?
That depends on the motor’s thrust setting and how much of the day it actually runs — no honest answer exists without your duty pattern. The comparison you can make from the specification is energy: 3,200Wh here, against 2,560Wh in the 100Ah model — a quarter more in the same 24V format. Send the motor model and your typical day in the inquiry and we size against the real profile instead of guessing.
Does the heating also warm the battery for discharging?
It does not need to: LiFePO4 discharges safely well below 0 °C (with reduced capacity); it is charging that cold forbids. The heating system exists to bring cells into the safe charging window when a charger is connected. If your duty cycle needs warming with no charger present, raise it in the inquiry — that is a project configuration.
What happens if the heater fails on a frozen morning?
The same thing that happens with a standard battery: the BMS low-temperature cut-off keeps charging blocked and the cells stay safe. Heating is layered on top of the protection, never instead of it — a heater fault costs you a charge, never a cell.
Will Bluetooth drain the battery in storage?
The BMS standby draw, Bluetooth included, is small against a 125Ah pack, but it is not zero. For storage measured in months, charge the battery to its storage level and follow the storage instructions in the quotation documents; for a winterised boat, check the app state once in a while — which is rather the point of having it.
The Bluetooth & Heating Series
This page is the 25.6V 125Ah model of LJY Energy’s Bluetooth & heating LiFePO4 series — finished batteries whose smart BMS combines per-cell Bluetooth monitoring with automatic low-temperature heating for charging: 12.8V 100Ah, 12.8V 200Ah, 12.8V 314Ah, 12.8V 460Ah, 25.6V 100Ah, 25.6V 125Ah (this page) and 51.2V 100Ah, all confirmed per order specification. The full product range is on Products.
Request a quotation for this battery: Start a BTH-24V125 inquiry · WhatsApp: +86 159 8945 0735
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